import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args){
        String str,reg;
        Scanner scan = new Scanner(System.in);
        str = scan.next();

        //请在此添加代码
        //****************Begin**************

        //**************End******************
    }
}